"Classification." . . "Sonar." . . "Acoustic Detection and Detectors." . . "Cost effectiveness." . . "Computer programs." . . "Digital filters." . . . . . . . . . . . . "Contract NObsr-95181 has two basic parts--one to investigate the utility of cepstrum analysis as an aid to active sonar classification, and the other to develop computer techniques to help with the problem of choosing sonar systems and specific relevant proposals on the basis of optimum (cost-effectiveness) return."@en . . . . "Quarterly Progress Report Number 1, 1 August - 31 October 1966"@en . "Spectrum analysis." . . "TEXAS UNIV AT AUSTIN DEFENSE RESEARCH LAB." . . "Pert." . .